CN104533468B - A kind of subway tunnel the wall of a borehole post-grouting method - Google Patents
A kind of subway tunnel the wall of a borehole post-grouting method Download PDFInfo
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- CN104533468B CN104533468B CN201410814477.3A CN201410814477A CN104533468B CN 104533468 B CN104533468 B CN 104533468B CN 201410814477 A CN201410814477 A CN 201410814477A CN 104533468 B CN104533468 B CN 104533468B
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- ball valve
- aperture
- grouting
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The present invention provides a kind of pipe with small pipe diameter grouting behind shaft or drift lining methods of the autonomous cloth hole of subway tunnel, for administering subway tunnel section of jurisdiction calibrated bolck and arch bottom water leakage defect, the grouting method includes bore position of first arranging on section of jurisdiction calibrated bolck and arch bottom, then in hole of subdrilling, anchoring adhesive is poured into a secondary aperture, the hollow metal pipe of one end mounting ball valve, the other end cement seal is inserted into, the metal tube is fixed in a secondary aperture after curing molding；The ball valve and an aperture are then passed through to the secondary pore that spuds in；Injection high molecule size in the most backward metal tube and secondary pore.The present invention can pointedly administer the percolating water of subway tunnel section of jurisdiction percolating water, especially the longitudinal joint position between the section of jurisdiction calibrated bolck distant from preformed hole and arch bottom using autonomous bore distribution method；The slip casting aperture of the present invention defines a small numberical range, and cutting or grazing are to the probability of the larger stirrup of section of jurisdiction laying density when being greatly reduced drilling.
Description
Technical field
The present invention relates to a kind of subway tunnel maintenance technologies more particularly to one kind to be used to administer subway tunnel section of jurisdiction percolating water
The wall of a borehole post-grouting method.
Background technology
District of Shanghai belongs to soft soil foundation, and high-moisture, high-voidage ratio, high sensitive, low intensive rheological characteristic are flabbily
Layer, with the growth of metro operation time, due to the soil nature of bottom, the earth sedimentation, neighboring buildings construction activities, row around tunnel
The influence of the factors such as oscillatory load easily leads to operation tunnel integrally there are non-uniform relative settlements in vehicle operation.It is this uneven
Sedimentation be easy to cause the longitudinal joint of tunnel duct piece and circumferential weld generates percolating water, and increasing for water leakage defect exacerbates tunnel unevenness
The percolating water of the development of even Settlement diseases, particularly calibrated bolck and arch bottom ring longitudinal joint also causes railway roadbed and the connection of section of jurisdiction casting
Place generates gap, carrys out major hidden danger to the operation security and tunnel structure safety belt of subway if administered not in time.
Section of jurisdiction calibrated bolck, arch bottom water leakage defect is administered at present mainly using noting polyurethane slurry after wall, using poly-
The characteristic of urethane material water-swellable is filled the gap of section of jurisdiction upstream face, and protective layer is formed outside section of jurisdiction, obstructs underground
Infiltration of the water to section of jurisdiction.But in the construction process, find the method for former grouting behind shaft or drift lining mainly by punching calibrated bolck or arch bottom
Reserved hole carries out grouting behind shaft or drift lining.Since the position of section of jurisdiction preformed hole is fixed, for the percolating water of the ring longitudinal joint of part, use
" got ready by face " in a manner of, lot of materials is consumed, and the trend that protective layer is formed after wall is difficult to manipulate, to some positions
Water leakage defect cannot remove completely, and a slip casting period completes, the section of jurisdiction calibrated bolck distant from preformed hole and arch bottom
Between longitudinal joint position still there is infiltration or section of jurisdiction face to have the wet mark phenomenon of continuity, disease management effect often repeatedly, seriously affects
Construction efficiency.
Invention content
What the present invention was proposed to solve the above problem of the prior art.
The present invention provides a kind of pipe with small pipe diameter grouting behind shaft or drift lining methods of the autonomous cloth hole of subway tunnel.
To achieve the above object, the present invention uses following technical scheme：
The present invention provides a kind of subway tunnel the wall of a borehole post-grouting method, for administering subway tunnel section of jurisdiction calibrated bolck and arch
Sole piece water leakage defect, the grouting method include the following steps：
Step 1：It arranges on the section of jurisdiction bore position；
Step 2：Primary drilling clears up after a secondary aperture and pours into anchoring adhesive, the preferred 100-200ml of the amount of pouring into, such as
150ml or so；
Step 3：The hollow metal pipe of one end mounting ball valve, the other end cement seal is produced in advance, by the metal
In a secondary aperture described in one end inserting step 2 of effective cement seal, the anchoring adhesive rises along the metal pipe outer wall,
And with a hole wall curing molding, which is fixed in a secondary aperture；
Step 4：Secondary drilling, the ball valve on metal tube described in opening steps 3, across the ball valve and an aperture
To the secondary pore that spuds in；
Step 5：High molecule size is injected into the metal tube and secondary pore；
Step 6：Slip casting removes the ball valve of the metal tube after completing at least one moon, such as half a year, uses epoxy resin mortar
Block grouting port.
In the preferred embodiment of the present invention, by the way of autonomous cloth hole, autonomous cloth hole must assure that the step 1
The case of Structural Test of Tunnel Segments, cloth hole site must avoid section of jurisdiction main reinforcement, to ensure that tunnel segment structure is not destroyed.
In another preferred embodiment, the aperture of secondary pore is big described in the aperture ratio of a secondary aperture, a secondary aperture
Aperture should not be too large, if aperture is excessive, cutting or grazing are to the larger hoop of section of jurisdiction laying density when can be substantially improved drilling
The probability of muscle, thus the preferred 15-45mm in aperture of a secondary aperture, more preferable 20-30mm.Section of jurisdiction thickness is 350mm, for the first time
Drilling cannot drill section of jurisdiction, reserve 150mm or so, therefore the drilling depth of a secondary aperture is preferably 150-250mm, such as
200mm；Section of jurisdiction is drilled for the second time, the depth of the secondary pore is preferably 350-450mm.Drilling is preferably perpendicular to twice
Section of jurisdiction.
Metal material is anchored in concrete by the anchoring adhesive used in grouting method step 2 of the present invention to be suitable for
Macromolecular adhesive material, such as like sharp HIT-RE500, this adhesive needs 10-20 small from constructing to being fully cured
When time, therefore in the step 3 by metal tube be inserted into a secondary aperture between the time between the secondary drilling of the step 4
Every at least 12 hours, such as 24 hours.
The slurry being perfused in grouting method of the present invention is high molecule size, preferably dual-component polyurethane slurry, is this field
Known technology.
In the preferred embodiment of the present invention, the grouting method of the step 5 includes the following steps：
Step a will be connected in the pulp-absorbing pipe and return duct access slurry of mashing pump, and the mashing pump is by Frequency Converter Control
Rotating speed；
Step b：The other end of mashing pump is connected into Grouting Pipe, and the Grouting Pipe is inserted into the ball valve of metal tube, is closed
Ball valve；
Step c：Power supply is opened, starts the rotating speed of Frequency Converter Control mashing pump in 500-700rpm, closing volume tube valve,
Slurry enters gear pump, then opens the ball valve of the metal tube, and slurry is enabled to pass through in Grouting Pipe and ball valve injection hole；
Step d：After slip casting, the ball valve of metal tube is closed, opens reflux tube valve, then opens the progress of metal tube ball valve
Release.
Preferably, it is 20-40kg per hole grouting amount.Grouting sequence is preferably：On tunnel longitudinal direction, " doing a jump two ", i.e., often
One hole of septum secundum holes slip casting；And " getting on, get off ", i.e., according to injected hole distribution situation, from bottom to top slip casting successively.
The present invention compared with prior art, is had the following technical effect that using above-mentioned technical proposal：
1st, the present invention can pointedly administer subway tunnel section of jurisdiction percolating water using autonomous bore distribution method, especially to from pre-
The percolating water of longitudinal joint position between the section of jurisdiction calibrated bolck and arch bottom of boxing out distant.
2nd, slip casting aperture of the invention defines a small numberical range, and cutting or grazing are to managing when drilling is greatly reduced
The probability of the larger stirrup of piece laying density.
Description of the drawings
Fig. 1 is subway tunnel section of jurisdiction sectional view；
Fig. 2 a are the decomposing section of section of jurisdiction calibrated bolck 11 and 12；
Fig. 2 b are the decomposing section of section of jurisdiction arch bottom 21；
Fig. 3 is the downward projection cloth hole plan view of Fig. 2 a；
Fig. 4 is the schematic diagram of step 3 in grouting method of the present invention；
Fig. 5 is that 2 writing brush caliber metal tubes and 1 drilling for depositing caliber metal tube compare block diagram in present pre-ferred embodiments.
In figure, 1- sections of jurisdiction, 11- calibrated bolcks 1,12- calibrated bolcks 2,21- arch bottoms, 31- adjacent blocks 1,32- adjacent blocks 2,41-
Bind block, 2- metal tubes, 3- ball valves, 4- cement sealing end, 5- anchoring adhesives.
Specific embodiment
The present invention is described in more detail below by specific embodiment, for a better understanding of the present invention,
But following embodiments are not intended to limit the scope of the invention.
A kind of pipe with small pipe diameter grouting behind shaft or drift lining method of the autonomous cloth hole of subway tunnel is present embodiments provided, for administering subway tunnel
Road section of jurisdiction calibrated bolck and arch bottom water leakage defect.Fig. 1 shows subway tunnel section of jurisdiction sectional view, as seen from the figure, subway tunnel
Road section of jurisdiction 1 includes the calibrated bolck 11 of two lower portion and calibrated bolck 12, the arch bottom 21 of bottom, the adjacent block 31 of two upper portions
With adjacent block 32, the block 41 that binds at top.The calibrated bolck 11, calibrated bolck 12 and the arch bottom 21 that come are decomposited respectively in Fig. 2 a and figure
It is shown in 2b, this three pieces positions for the present embodiment autonomous cloth hole in subway tunnel.
The grouting method carries out in accordance with the following steps：
Step 1：It arranges on the calibrated bolck 11, calibrated bolck 12 and arch bottom 21 of the section of jurisdiction bore position, Fig. 3 is shown
The downward projection cloth hole plan view of calibrated bolck 11 or calibrated bolck 12, figure medium square line are section of jurisdiction main reinforcement, and when cloth hole must avoid pipe
Piece main reinforcement, to ensure that tunnel segment structure is not destroyed, preferential to select box interior zone in figure, wherein A classes region is more preferable
Region, B classes region are suboptimum favored area.
Step 2：It is once drilled, is bored using TE-YX35/570 drill bits (active length 400mm, #35 drill bit) with electric hammer
Hole depth generally must be perpendicular to section of jurisdiction in 200mm or so, drilling, and drilling for the first time cannot drill the section of jurisdiction of 350mm thickness, in advance
Stay 150mm or so；A secondary aperture is cleared up after the completion of drilling, blown out dust in hole with inflator and is cleared up with water；Then it pours into
It likes sharp that HIT-RE500 anchors adhesive, the amount of pouring into 150ml or so.
The aperture of one secondary aperture should not be too large, if aperture is excessive, cutting or grazing are to managing when can be substantially improved drilling
The probability of the larger stirrup of piece laying density.As shown in figure 5, the metal tube using 1 writing brush diameter punches 10 times, cutting occurs or touches
The number of tactile stirrup only 1 time；It is punched 3 times using the metal tube of 2 writing brush diameters, stirrup accident is cut or touched in 3 all generations.Thus
Select the metal tube of 1 writing brush diameter, the preferred 15-45mm in aperture of a secondary aperture, more preferable 20-30mm, the hole of the secondary pore
Diameter is smaller than the aperture of a secondary aperture.
Step 3：As shown in figure 4, the hollow metal of one end mounting ball valve 3, the other end cement seal 4 is produced in advance
Pipe 2 is used the metal tube 2 in the secondary aperture described in 4 inserting step 2 of one end of cement seal, due to metal tube 2 in insertion process
Bottom lock, anchoring adhesive 5 along 2 outer wall of metal tube rise, and with a hole wall curing molding, by the metal
Pipe 2 is fixed in a secondary aperture；Then it will be secured at the gap between ball valve 3 and metal tube 2 admittedly with fast water shutoff mud, to complete
Ball valve is installed, and closes ball valve 3.
Step 4：After spending 24 hours, the ball valve 3 on injected hole is opened, (work is grown using TE-YX16/920 drill bits with electric hammer
Spend 800mm, 16# drill bits) across the ball valve 3 and an aperture to the secondary pore that spuds in, the depth of secondary pore is 350-
450mm extracts drill bit out, and closes ball valve 3；
Step 5：Polyurethane slurry is injected into the metal tube and secondary pore；
Step 5.1：Frequency converter, slurry gear pump, Grouting Pipe, pulp-absorbing pipe and return duct are assembled, in polyurethane host agent
The secondary agent for adding in 6%-8% is stirred, and in the slurry that is stirred of pulp-absorbing pipe slurry gear pump and return duct access；
Step 5.2：Grouting Pipe is accessed into ball valve and fastening；
Step 5.3：Power supply is opened, starts the rotating speed of Frequency Converter Control slurry gear pump between 500 to 700 turns, slurry
The pressure control of gear pump is expected in 0.3MPa, the closing volume tube valve when slurry enters slurry gear pump, and open simultaneously note
The valve of slurry pipe and ball valve so that after slurry injects section of jurisdiction wall by Grouting Pipe and ball valve；After slip casting, ball valve is simultaneously closed off
And the valve of Grouting Pipe, reflux tube valve is opened, then open slip casting tube valve and carry out release；
Step 5.4：Removal Grouting Pipe removes section of jurisdiction, the residue on ball valve after urethane cures, cleans slurry gear
Pump, Grouting Pipe, pulp-absorbing pipe and return duct, in case residual slurry curing blocks pipeline.
Step 6：Slip casting removes the ball valve of the metal tube after completing half a year, blocks grouting port with epoxy resin mortar, screws on
Silently.
It should be controlled in 20-40kg per hole grouting amount, can suitably adjust grouting amount according to field condition.
Grouting sequence principle：On tunnel longitudinal direction, " doing a jump two ", i.e., per two ring slip casting of septum secundum, one ring；" getting on, get off ", i.e.,
According to injected hole distribution situation, from bottom to top slip casting successively.
The present invention can pointedly administer subway tunnel section of jurisdiction percolating water using autonomous bore distribution method, especially to from reserved
The percolating water of longitudinal joint position between hole distant section of jurisdiction calibrated bolck and arch bottom；The slip casting aperture of the present invention defines one
A small numberical range, cutting or grazing are to the probability of the larger stirrup of section of jurisdiction laying density when being greatly reduced drilling.
Application examples：
Shanghai Rail Line 7 line Longhua Road-back beach uplink accident section once occurred because by-pass bottom plate emits silt
Dangerous situation, 30 mitron pieces and railway roadbed calibrated bolck and arch bottom ring longitudinal joint percolating water situation ratio caused by tunnel subsidence near by-pass
More serious, including there is ponding on gutter even railway roadbed, continuous wet mark is arranged at continuous calibrated bolck section of jurisdiction bottom, these diseases are again
The accident section tunnel duct piece being damaged is caused further to encroach on, while moist tunnel environment and ponding are on railway roadbed
Rail and fastener all cause corrosion and infringement.
Apparent according to calibrated bolck section of jurisdiction ring longitudinal joint percolating water from the point of view of the situation at scene, arch bottom is oozed with calibrated bolck seam crossing
Leak causes railway roadbed and gutter and section of jurisdiction surface are quite moist even to have ponding, there is a certain amount of station draining in gutter
Flow into the sump of by-pass.Therefore the water that judging this section of ponding humidity not only has tunnel to extravasate into also has part to be arranged from station
Water penetrates into the gap of gutter bottom and section of jurisdiction, if coupling for railway roadbed and section of jurisdiction can be influenced not in time by administering.
Using three step constructions from outside to inside：
First stage first (has arch bottom to reserve calibrated bolck preformed hole and arch bottom preformed hole close to 20 meters or so of by-pass
Hole) polyurethane slip casting after continuous section of jurisdiction wall is carried out, calibrated bolck grouting amount control in side exists in 50kg, the control of arch bottom grouting amount
100kg, using " doing a jump two " i.e. per one ring of septum secundum two ring slip casting, the sequence of first arch bottom calibrated bolck again.Pass through a slip casting
The infiltration phenomenon of period railway roadbed and calibrated bolck ring longitudinal joint substantially eliminates but section of jurisdiction surface also has continuous wet mark and gutter is with encircleing bottom
Block seam crossing still has infiltration.
Second stage grouting method using the present invention, in the autonomous cloth hole pipe with small pipe diameter polyurethane note in both sides calibrated bolck bottom
Slurry, grouting amount control 20 kilograms, equally using " doing a jump two " i.e. per two ring slip casting of septum secundum, one ring.Tunnel after the completion of second stage
Outer water leakage defect substantially eliminates.
Phase III carries out borehole inspection to railway roadbed and gutter, it is found that railway roadbed bottom is closely knit and gutter bottom is had time
Gap, using epoxy resin grout liquid grout, the characteristics such as strong using epoxy resin adhesion strength, shrinkage is low, and cure cycle is short are to draining
Ditch bottom carries out structural strengthening, does not penetrate into gutter bottom to ensure that station is discharged into the water of section sump, it is ensured that railway roadbed not by
To infringement.The moist tunnel environment of During Initial Stage Construction and serious water leakage defect are thoroughly renovated after three stages have been completed.
Specific embodiments of the present invention are described in detail above, but it is intended only as example, it is of the invention and unlimited
It is formed on particular embodiments described above.To those skilled in the art, it is any to the equivalent modifications that carry out of the present invention and
It substitutes also all among scope of the invention.Therefore, the impartial conversion made without departing from the spirit and scope of the invention and
Modification, all should be contained within the scope of the invention.
Claims (9)
1. a kind of subway tunnel the wall of a borehole post-grouting method, which is characterized in that for administering subway tunnel section of jurisdiction calibrated bolck and arch
Sole piece water leakage defect, the grouting method include the following steps：
Step 1：It arranges on the section of jurisdiction bore position；
Step 2：Primary drilling, anchoring adhesive is poured into after clearing up a secondary aperture；
Step 3：Produce the hollow metal pipe of one end mounting ball valve, the other end cement seal in advance, by the metal tube by
In a secondary aperture described in one end inserting step 2 of cement seal, and the ball valve is kept to be located at outside a secondary aperture, the anchoring gluing
Agent along the metal pipe outer wall rise, and with a hole wall curing molding, which is fixed on a secondary aperture
It is interior；
Step 4：Secondary drilling, the ball valve on metal tube described in opening steps 3, across the ball valve and an aperture to opening
Bore secondary pore；
Step 5：High molecule size is injected into the metal tube and secondary pore；
Step 6：Slip casting removes the ball valve of the metal tube after completing at least one moon, blocks grouting port；
Wherein, the grouting method of the step 5 includes：
Step a will be connected in the pulp-absorbing pipe and return duct access slurry of mashing pump, and the mashing pump is turned by Frequency Converter Control
Speed；
Step b：The other end of mashing pump is connected into Grouting Pipe, and the Grouting Pipe is inserted into the ball valve of metal tube, closes ball valve；
Step c：Power supply is opened, starts the rotating speed of Frequency Converter Control mashing pump in 500-700rpm, closing volume tube valve, slurry
Into gear pump, the ball valve of the metal tube is then opened, slurry is enabled to pass through in Grouting Pipe and ball valve injection hole；
Step d：After slip casting, the ball valve of metal tube is closed, opens reflux tube valve, then open metal tube ball valve and unloaded
Pressure.
2. grouting method according to claim 1, which is characterized in that the bore position arranged in the step 1 avoids pipe
Piece reinforcing bar.
3. grouting method according to claim 1, which is characterized in that the hole of secondary pore described in the aperture ratio of a secondary aperture
Diameter is big, and the aperture of a secondary aperture is 15-45mm, and the depth of a secondary aperture is 150-250mm, and the depth of the secondary pore is
350-450mm。
4. grouting method according to claim 1 a, which is characterized in that secondary aperture and secondary pore are perpendicular to the pipe
Piece.
5. grouting method according to claim 1, which is characterized in that the amount of pouring into of anchoring adhesive is in the step 2
100-200ml。
6. grouting method according to claim 1, which is characterized in that it is small to be separated by least 12 between the step 3 and step 4
When.
7. grouting method according to claim 1, which is characterized in that the high molecule size in the step 5 is two-component
Polyurethane slurry.
8. grouting method according to claim 1, which is characterized in that every hole grouting amount is 20-40kg.
9. grouting method according to claim 1, which is characterized in that in the step 6, slip casting is blocked with epoxy resin mortar
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410814477.3A CN104533468B (en) | 2014-12-19 | 2014-12-19 | A kind of subway tunnel the wall of a borehole post-grouting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410814477.3A CN104533468B (en) | 2014-12-19 | 2014-12-19 | A kind of subway tunnel the wall of a borehole post-grouting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104533468A CN104533468A (en) | 2015-04-22 |
| CN104533468B true CN104533468B (en) | 2018-07-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971642A (en) * | 2016-06-30 | 2016-09-28 | 北京城建七建设工程有限公司 | Water seepage treatment device and method for abutted seam of shield segments |
| CN107131001B (en) * | 2017-06-28 | 2023-09-12 | 中铁第四勘察设计院集团有限公司 | High-speed railway tunnel with water delivery and traffic functions |
| CN111927503B (en) * | 2020-06-30 | 2022-07-08 | 上海地铁维护保障有限公司工务分公司 | Subway tunnel wall back grouting method |
| CN111878119B (en) * | 2020-07-08 | 2022-03-18 | 上海地铁维护保障有限公司工务分公司 | Subway tunnel ballast bed pipe piece wall post-grouting method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147198A (en) * | 2000-11-15 | 2002-05-22 | Sementetsukusu Corp:Kk | Leakage preventing method for tunnel |
| JP4448405B2 (en) * | 2004-08-18 | 2010-04-07 | 大阪市 | RC segment, check boring method and core boring method using this RC segment |
| CN101864968B (en) * | 2010-06-23 | 2013-04-17 | 广东华隧建设股份有限公司 | Anti-spouting device for tunnel bottom stratum consolidation and construction method thereof |
| CN102758639B (en) * | 2012-04-10 | 2014-12-10 | 中铁隧道集团三处有限公司 | Anti-blowout long tube grouting method for limited-space tunnels |
| CN102979535B (en) * | 2012-12-27 | 2015-12-02 | 西南交通大学 | Draining type section of jurisdiction is used in a kind of tunnel lining |
| CN103422868B (en) * | 2013-08-06 | 2015-10-21 | 同济大学 | The structure of a kind of Super-void Water Pressure that dissipates, reinforcing shield tunnel soil body and method |
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Effective date of registration: 20230726 Address after: Room 1089, 6 / F, B1, 253 Jianguo West Road, Xuhui District, Shanghai 200031 Patentee after: SHANGHAI RAIL TRANSIT MAINTENANCE SUPPORT Co.,Ltd. Address before: Room 1097, No. 6, B1 ground floor, No. 253, Jianguo West Road, Xuhui District, Shanghai, 200030 Patentee before: WORKS BRANCH, SHANGHAI SUBWAY MAINTENANCE GUARANTEE Co.,Ltd. |
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